CN102756522B - Ultraviolet isolating greenhouse films - Google Patents
Ultraviolet isolating greenhouse films Download PDFInfo
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- CN102756522B CN102756522B CN201210219813.0A CN201210219813A CN102756522B CN 102756522 B CN102756522 B CN 102756522B CN 201210219813 A CN201210219813 A CN 201210219813A CN 102756522 B CN102756522 B CN 102756522B
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- ultraviolet
- greenhouse films
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- isolating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Abstract
The invention discloses a kind of ultraviolet isolating greenhouse films.Ultraviolet-resistant film of the present invention is the membrane structure comprising the three-layer co-extruded one that is composited of skin, middle level and internal layer; Mainly by PE Processing process, layer introduces ultraviolet inhibitor in the film, makes the film product of machine-shaping can have shielding action to the subband ultraviolet light in daylight, has blocked the light that part is harmful to plant growth.Special in floriculture greenhouse planting process, the invention solves the phenomenon of the petal color and luster obfuscation of rose flowers, improve the commercial value of its product.Ultraviolet-resistant film of the present invention can intercept the ultraviolet light of the 290-380nm of more than 98% effectively, is conducive to the generation controlling the crop disease and insects such as crop black spot, gray mold, sclerotiniose, is particularly useful for the plantation of rose class flowers.
Description
Technical field
The present invention relates to a kind of greenhouse films, particularly relate to a kind of ultraviolet isolating greenhouse films.Belong to agricultural film preparing technical field.
Background technology
The end of the seventies in last century the functional plastic sheeting for farm use of China grow up on the basis of common canopy film.In the last few years, in order to meet the anti-season growth of crop, increasing enterprise development have developed the film for agricultural use of specific function.At present, the film for ordinary greenhouse is the Ageing-resistant film adopting common low-density polyethylene material to make mostly, but the intensity difference of common polythene Ageing-resistant film, transparent heat insulating performance is general, is difficult to the growing environment needs meeting the crops such as top grade flower.
As everyone knows, in sunshine, 7-8% is ultraviolet light, for crop-planting, though ultraviolet light has certain bactericidal action, is also the principal element causing film aging simultaneously.Further, due to the irradiation of sunshine middle-ultraviolet lamp, easily there are black spot, gray mold, sclerotiniose etc. in some crops, and such as, when planting rose class flowers, its petal is easy to the phenomenon occurring that color and luster shades.Therefore, for the flowers that black spot easily occurs, when utilizing traditional polyethylene ultraviolet-resistant film to grow, its flowers quality is not very high.
Through finding the retrieval of prior art, Chinese Patent Application No. 200920221625.5 reports a kind of metallocene anti-pesticide flower membrane.This utility model points out that its flower membrane has high insulation, high printing opacity and anti-pesticidal properties, but it does not have the function suppressing ultraviolet light, can not prevent the generation of flowers black spot.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of agricultural greenhouse film that can prevent crop generation black spot, gray mold, sclerotiniose etc.
For achieving the above object, the invention provides a kind of ultraviolet isolating greenhouse films.Ultraviolet-resistant film of the present invention mainly by introducing ultraviolet inhibitor in polyethylene film process, make the film product of machine-shaping can have shielding action to the subband ultraviolet light in daylight, thus the light that shield portions is harmful to plant growth.For flower planting, ultraviolet-resistant film of the present invention can solve the phenomenon of the petal color and luster obfuscation of flowers, thus promotes the commercial value of its product.
In concrete technical scheme of the present invention, the ultraviolet inhibitor in ultraviolet isolating greenhouse films can intercept the ultraviolet light of 290-380nm effectively, thus effectively can control the sick generation such as crop black spot, gray mold, sclerotiniose.
The present invention solves above-mentioned technical problem by following technical solution:
On the one hand, the invention provides a kind of ultraviolet isolating greenhouse films, described ultraviolet-resistant film comprises the coextrusion composite film structure of the three-layer co-extruded one that is composited of skin, middle level and internal layer; Wherein, outer field main material is PE (polyethylene), the main material in middle level is be added with the EVA (ethylene-vinyl acetate copolymer) of ultraviolet inhibitor or EVA and PE to mix, and the main material of internal layer is that PE or EVA and PE mixes.
Wherein, ultraviolet inhibitor is selected from one or more in 124 Triazole, benzophenone, OXYBENZONE, Benzophenone.For the main material in described middle level, the interpolation weight ratio of ultraviolet inhibitor in described middle level is preferably 4.0 ~ 7.0%.
In the specific embodiment of the present invention, the gross thickness of described ultraviolet-resistant film is 150 ~ 180mic, and density is 0.940 ~ 0.955g/cm
3.Preferably, the thickness proportion of described skin, middle level and internal layer is 1: 2: 1 or 3: 4: 3.
In ultraviolet isolating greenhouse films of the present invention, when the main material in described internal layer or middle level be EVA and PE mix composite bed time, the operating weight ratio of EVA and PE can carry out proportioning according to real needs; Preferably, in described internal layer or middle level, the weight ratio of EVA and PE is 0.5 ~ 0.8.
In the specific embodiment of the present invention, the skin of described ultraviolet-resistant film and/or middle level and/or internal layer are also added with correlation function masterbatch, this correlation function masterbatch be selected from non-drop fog-eliminating agent, age resister, heat preserving agent, sustained release agent, opening agent one or more.Preferably, the middle level of described ultraviolet-resistant film, skin, internal layer are all added with above-mentioned correlation function masterbatch.
In better embodiment of the present invention, the interpolation part by weight of described non-drop fog-eliminating agent, age resister, heat preserving agent, sustained release agent, opening agent is respectively 8 ~ 10%, 7 ~ 12%, 2 ~ 5%, 2 ~ 5%, 1 ~ 2%, in the internal layer of ultraviolet-resistant film, middle level, skin, this interpolation weight calculates relative to the weight of the main material of described layer respectively.
Preferably, the skin of described ultraviolet-resistant film is for being added with ageing-resistant PE; The internal layer of described ultraviolet-resistant film is EVA and LDPE being added with age resister, non-drop fog-eliminating agent and heat preserving agent.
In correlation function masterbatch of the present invention, non-drop fog-eliminating agent, age resister, heat preserving agent, sustained release agent, opening agent are the conventional reagent of the art, are not particularly limited this.Its object of adding is the cooling insulation and the utilizability that strengthen this ultraviolet-resistant film.
The ultraviolet inhibitor that the present invention adds belongs to organic low molecular material, can have good blended property with PE; Therefore, substantially can not have an impact to the optical property of described ultraviolet-resistant film.
Ultraviolet barrier film greenhouse films of the present invention is extruded by outer, middle level and internal layer three layers of mixing and shaping.Preferably, the preparation method of ultraviolet-resistant film of the present invention adopts the three-layer co-extruded film blowing device of Davis Co., Ltd of U.S. routine configuration.
Because uvioresistant inhibitor is harmfulness pulverulent solids, in the concrete preparation method of ultraviolet-resistant film, put in storage if directly added, its dispersiveness in film will be caused bad, thus affect the performance of its function.Meanwhile, because preparation method of the present invention takes the mode of continous batching, when concrete operations, pulverulent solids is unfavorable for batching, and has certain toxicity due to it, is also unfavorable for operation.Therefore, in concrete preparation method, uvioresistant inhibitor is by selecting LDPE (low density polyethylene (LDPE)) or LLDPE (LLDPE) to make carrier, be made into that ultraviolet suppresses the mode of masterbatch to carry out adding, it is specifically selected and can make corresponding adjustment according to film substrate and result of use.Particularly, first uvioresistant inhibitor is mixed with LDPE or LLDPE, then suppress master batch through the ultraviolet that twin-screw extrusion equipment carries out wire drawing, pelletizing obtains good stability; Again the resins such as itself and EVA carried out putting in storage, prepare burden, the process such as blowing.
The concrete preparation method of ultraviolet-resistant film of the present invention is as follows:
The various related raw materials such as resin (PE, EVA etc.), ultraviolet suppression masterbatch, the functional master batch that make each layer of this Obstruct membrane are put in storage, respectively by automatic blending, weigh and send into screw mixes and extrusion plasticizing becomes melt, metre filter, be diverted to die head through runner, extrude composite membrane-forming; This film extruded is again through blowing, traction, folding, rolling and make ultraviolet-resistant film finished product.
The opposing party and, the invention still further relates to the application of above-mentioned ultraviolet-resistant film in greenhouse booth crop and flowers, the application especially in greenhouse booth rose flowers class.
Ultraviolet-resistant film ageing-resistant life-span of the present invention, long, crop can evenly light, insulation, wind loading rating be strong.By introducing ultraviolet inhibitor in PE Processing process, make the film product of machine-shaping can have shielding action to the most of wave band ultraviolet light in daylight, thus the light that shield portions is harmful to plant growth, effectively can suppress insect pest activity, reduce and delay virus between crop mutually to propagate, also have simultaneously and reduce the gentle ageing-resistant function of canopy in summer.Ultraviolet-resistant film of the present invention is applicable to the plantation of the flowers that black spot easily occurs, and is particularly useful for the growth of rose class flowers, its best results; Ultraviolet-resistant film of the present invention can solve the phenomenon of its petal color and luster obfuscation, reaches the generation controlling black spot, thus improves the commercial value of its product.
After testing, ultraviolet-resistant film of the present invention can shield the ultraviolet light of the 290-380nm wave band of more than 98% effectively.In addition, owing to being also added with cooling heat preserving agent, soft resin etc. in film of the present invention, the wind loading rating of booth can being promoted, and reach " cool in summer and warm in winter " thermoregulation effect.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the structural representation of ultraviolet isolating greenhouse films of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of comprise internal layer 2, middle level 1, outer 3 the ultraviolet isolating greenhouse films of three-layer co-extruded structure of composite membrane.Wherein, outer 3 main materials are PE, and the main material in middle level 1 is be added with EVA or EVA of 4.0 ~ 7.0% ultraviolet inhibitors and PE to mix, and internal layer 2 mainly material is that PE or EVA and PE mixes.
Wherein, described ultraviolet inhibitor is selected from one or more in 124 Triazole, benzophenone, OXYBENZONE, Benzophenone.
The preparation method of this anti-ultraviolet barrier greenhouse films is specially: by internal layer 2, middle level 1, outer 3 each related raw material respectively by putting in storage, automatic blending, wherein, ultraviolet inhibitor suppresses masterbatch mode to be added with the ultraviolet making carrier with LDPE or LLDPE, and the mass ratio of ultraviolet inhibitor in LDPE or LLDPE is 15 ~ 25%; Weigh and send into the screw mixes of three-layer co-extruded film blowing device and extrusion plasticizing becomes melt; Metre filter, is diverted to die head through runner, extrudes composite membrane-forming; This film extruded makes this ultraviolet-resistant film finished product through blowing, traction, folding, rolling again.
The preparation of the ultraviolet-resistant film product in embodiment adopts the three-layer co-extruded film blowing device of Davis Co., Ltd of U.S. routine configuration.
Addition described in embodiment is the percentage by weight of interpolation.The consumption of the functional master batch added in each layer calculates relative to the total weight percent of material various in layer described in it.
Embodiment 1
A kind of ultraviolet isolating greenhouse films comprising internal layer, middle level, outer field three-layer co-extruded structure of composite membrane.Wherein, outer material is the PE being added with 12% age resister, 2% sustained release agent, middle level material is the EVA being added with 5% ultraviolet inhibitor, 10% non-drop fog-eliminating agent, 5% heat preserving agent, 12% age resister, 4% sustained release agent, and internal layer material is be added with the age resister of 12%, EVA and PE of 2% sustained release agent and 10% non-drop fog-eliminating agent.In internal layer, the operating weight ratio of EVA and PE is 1: 2.
Wherein, ultraviolet inhibitor is select LLDPE to make the compound plasticized masterbatch of the 124 Triazole of carrier, Benzophenone, and the interpolation weight ratio of 124 Triazole, Benzophenone is 80: 20; And the mass ratio of ultraviolet inhibitor in LLDPE is 20%.
The thickness proportion of the skin of the ultraviolet-resistant film obtained by the present embodiment, middle level and internal layer is 1: 2: 1, and the gross thickness of film is 150mic, and density is 0.948g/cm
3.
Obtained ultraviolet-resistant film is tested by ultraviolet specrophotometer, and its result shows: when 290-380nm wave band ultraviolet light is by this film, the ultraviolet light of more than 98% is all absorbed, only a small amount of ultraviolet light-transmissive.This product easily turns black when can effectively prevent crop-planting the difficult problem of pinta, ensure that its normal growth and can create considerable commercial value.And practice finds, owing to being combined non-drop fog-eliminating agent, heat preserving agent and age resister when this film makes, obtained product has also had effectively suppression insect pest activity, has reduced the gentle ageing-resistant function of canopy in summer.
Embodiment 2
A kind of ultraviolet-resistant film comprising internal layer, middle level, outer field three-layer co-extruded structure of composite membrane.Wherein, outer material is the PE being added with 12% age resister and 2% sustained release agent, middle level material is EVA and PE being added with 10% non-drop fog-eliminating agent, 4% sustained release agent, 12% age resister, 7% ultraviolet inhibitor, and internal layer material is for being added with 10% non-drop fog-eliminating agent, 2% sustained release agent and 12% ageing-resistant PE.In middle level, the operating weight ratio of EVA and PE is 1: 2.
Wherein, ultraviolet inhibitor is the masterbatch selecting LDPE to do the 124 Triazole of carrier, OXYBENZONE, Benzophenone compound mixing plasticizing, and the interpolation weight ratio of 124 Triazole, OXYBENZONE, Benzophenone is 60: 20: 20; And the mass ratio of ultraviolet inhibitor in LDPE is 25%.
The gross thickness of the ultraviolet-resistant film obtained by the present embodiment is 180mic, and density is 0.941g/cm
3.Wherein, the thickness proportion of outer, middle level and internal layer is 3: 4: 3.
Obtained ultraviolet-resistant film is tested by Ultravioblet spectrophotometer, and its result shows: when 290-380nm wave band ultraviolet light is by this film, the ultraviolet light of more than 98% is all absorbed.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that the ordinary skill of this area just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (7)
1. a ultraviolet isolating greenhouse films, is characterized in that, described ultraviolet isolating greenhouse films is the coextru-lamination membrane structure comprising skin, middle level and internal layer three layers; Wherein, skin is PE, and middle level is be added with EVA or EVA of ultraviolet inhibitor and PE to mix, and internal layer is that PE or EVA and PE mixes;
Described ultraviolet inhibitor be selected from 124 Triazole, benzophenone, OXYBENZONE, Benzophenone one or more;
The interpolation weight of described ultraviolet inhibitor in described middle level is 4.0 ~ 7.0%;
The internal layer of described ultraviolet isolating greenhouse films and/or middle level and/or skin also containing functional master batch, described functional master batch be selected from non-drop fog-eliminating agent, age resister, heat preserving agent, sustained release agent, opening agent one or more;
The interpolation part by weight of described non-drop fog-eliminating agent, age resister, heat preserving agent, sustained release agent, opening agent is respectively 8 ~ 10%, 7 ~ 12%, 2 ~ 5%, 2 ~ 5%, 1 ~ 2%.
2. ultraviolet isolating greenhouse films as claimed in claim 1, is characterized in that, described internal layer or middle level be PE and EVA mix composite bed time, the weight ratio of EVA and PE is 0.5 ~ 0.8.
3. ultraviolet isolating greenhouse films as claimed in claim 1, it is characterized in that, described ultraviolet inhibitor adds in the masterbatch mode making carrier with LDPE or LLDPE.
4. ultraviolet isolating greenhouse films as claimed in claim 3, it is characterized in that, the mass ratio of described ultraviolet inhibitor in described carrier is 15 ~ 25%.
5. the ultraviolet isolating greenhouse films as described in any one of claim 1-4, is characterized in that, the thickness proportion of described skin, middle level and internal layer is 1:2:1 or 3:4:3.
6. the ultraviolet isolating greenhouse films as described in any one of claim 1-4, is characterized in that, the gross thickness of described ultraviolet isolating greenhouse films is 150 ~ 180mic, and density is 0.940 ~ 0.955g/cm
3.
7. the application of ultraviolet isolating greenhouse films in greenhouse booth crop and flower planting as described in any one of claim 1-6.
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| CN201210219813.0A CN102756522B (en) | 2012-06-28 | 2012-06-28 | Ultraviolet isolating greenhouse films |
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| CN201210219813.0A CN102756522B (en) | 2012-06-28 | 2012-06-28 | Ultraviolet isolating greenhouse films |
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| CN102756522B true CN102756522B (en) | 2015-12-16 |
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| CN103477915A (en) * | 2013-10-14 | 2014-01-01 | 中国农业大学 | Method for prolonging service life of solar greenhouse heat preservation quilt |
| CN104476868B (en) * | 2014-12-03 | 2016-11-30 | 安徽紫金新材料科技股份有限公司 | A kind of obstruct ultraviolet line style transparent membrane |
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| WO2017042207A1 (en) * | 2015-09-07 | 2017-03-16 | Beaulieu International Group Nv | Agro- and geotextiles |
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| CN108432507A (en) * | 2018-06-11 | 2018-08-24 | 宁波瑞凌节能环保创新与产业研究院 | A kind of Agricultural greenhouse film with radiation cooling function |
| CN110077017A (en) * | 2018-11-29 | 2019-08-02 | 陕西理工大学 | A kind of preparation method for the LDPE canopy film obstructing ultraviolet light |
| CN110214610B (en) * | 2019-06-26 | 2022-06-14 | 西藏俊富环境恢复有限公司 | Tray for tree planting and preparation method thereof |
| CN110978690A (en) * | 2019-11-14 | 2020-04-10 | 徐蕾 | Insect-proof film and preparation method thereof |
| CN110920182A (en) * | 2019-11-14 | 2020-03-27 | 徐蕾 | Heat-insulating transparent cooling film and preparation method thereof |
| CN111226649A (en) * | 2020-03-02 | 2020-06-05 | 山东华农塑料制品有限公司 | Special film for flowers |
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Inventor after: Yang Bingwen Inventor after: Jiang Tao Inventor after: Zhu Ping Inventor after: Shen Yan Inventor after: Meng Fansheng Inventor after: Lin Chaoming Inventor before: Yang Bingwen Inventor before: Jiang Tao Inventor before: Zhu Ping Inventor before: Shen Yan |
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